As reported yesterday, Microsoft changed the way how they license Windows 10 to their OEM partners. But buckle in folks, the changes just keep on coming. In what looks like an effort to push Windows 7 and Windows 8.1 owners to upgrade, Microsoft has officially announced that Office 2019 will only work on machines with Windows 10 and the next LTSC release of Windows Server. That's only the tip of the iceberg though. Unlike previous version of Office that came with 10 years of support, Office 2019's support lifecycle is shortened to five years of mainstream support and two years of extended support. Additionally, the client applications are only available with a Click-to-Run installer. However, Microsoft will continue to provide a MSI installer for the server applications.